Puncture-proof tread-block for pneumatic tires.



A. ROSENBERG & A. Hua ROSENTHAL.` PUNCTURE PROOF TREAD BLOCK FORPNEUMATIC TIRES.

' y APPLICATION FILED JUNE I3. [918. 1,292,519.

"Patented ',Tan. 28, 1919.

' 2 SHEETS-SHEET 1- A. ROSENBERG & A. H. ROSENTHAL. PuNcTuR PROOFIREADB'LocK FoR PNEuMATlc TIRES;

APPLICATION FILED JUNE I3. 1918.

Patented J an. 28",;

2 SHEETS-SHEET*1 2. I.'

'E S TENT .f Fred-CE.

.ABRAHAM ROSENBEIRG AND AMBROSE H. ROSENTHAL, 0F BROOKLYN, NEW YORK.

PUNCTUBE-PROOF {BREAD-BLOCK FOR PNEUMATIC TIRE'S.

Specification of Letters Patent.

Patented Jan. 2 8, 1919.

Applicatibn led .Tune 13, 1918. Serial No. 239,765.

To all whom t may concern:

Be it known that we, ABRAHAM Rosnnlntnov hicle, the blocks being soconstructed as to resist perforation, forming in fact an armor for thetread. v

Another object is to provide means whereby a plurality of tread blocksmay be engaged with the periphery of the tire, forming a continuousunbroken row completely around its circumference.

Anotherobject is to provide blocks which' may be caused to adhere to thematerial of the tread by vulcanizati on forming a unitary construction.

v Still another object is to provide means combined with the blockswhereby theymay be firmly secured to the tire, either as units or in anassemblage.

Further objects are to provide tread blocks containing within theirstructure metallic plates adapted. to. prevent punctures, blowouts andthe like, the armor elements extending' over the fperiphery and alongthe sides of the tire; to provide the tread blocks with a surfaceadapted to prevent skidding, slipping` or sliding in any direction, atthe same time having the effect of gears in con-v nection with theAsurface over which the vehicle operates; to provide means wherebysirgle tread block elements may be clamped in ependently to the tire,provide a tread which may be applied to a vehicle wheel of ordinaryconstruction, enabling the same to be used with entire facility overrailroad tracks.

These and other-"likeobjects,- which will become more fully manifest as.the description progresses, are attained lbythe novel construction andcombination of parts hereinafter described and shown in' the accomandfinally, to

panying drawings, forming a material part of this specification, and inwhich lFigure 1 is a fragmentary perspective .v1ew, showing a pair oftread blocks made 1n accordance with the invention and indicating theirapplication to a tire of conve'ntional construction.

Fig. 2 is a plan view, showing a single Fig. 7 is a perspective view,showing| a,

number of tread blocks engaged by vulcanizing on aconventional form oftlre.

Fig. 8 is an enlarged transverse sectional view taken through a tiremade in accordance with Fig. 7.

Fig. 9 is an enlarged sectional and fi'ag- -mentary perspective view,showing a similar form of'tire and rail engaging devlce connectedtherewith.

Fig. 10 is a plan view, showlng another metallic reinforcing plateadapted to be em bedded in the tread block.

Fig. 11 is a plan view showing a modified form of reinforcing plate usedalternately with Fig. 410. Fig 12 is a modi ed form of the same, and' Fi13 is a perspective view of one of the tread blocks showing itslowernand side surfaces.

IThroughout all of.' the several drawings the numeral 15 designates aconventional type of tread, as used upon vehicle wheels of the bettergrade, the same containing an inatable inner tube 16, arranged in theusual manner.

Each of the several tread blocks comprises an in'ner element 18, formedwith an outer or contacting element 20, the outer element having araised irregular surface 21, which plan view showing a further may be ofany fanciful design and which has the effect of impinging upon thesurface over which the vehicle operates in a manner to prevent lateralmovement and also to improve the traction of the Wheel.

' are metal guard plates, comprising a body upper surface of the portion28, curved in conformity with the tread of the tire, the extending ends29 being reduced in Width and corrugated, as indicated at 30.

Formed through the upper portion of the metallic reinforcing plates 28are a plurality of holes 32, (four being shown), whiclnin addition tothe corrugations of the end elements, serve to hold the plate firmlyembedded in the material of the tread blocks.

Where single tread blocks are used temporarily for repair purposes, the.ends 29 oi." these elements 'may have secured to them clips 33, securedby rivets 34 or like fastenings, the ends of the clips extending outwardthrough the material of the tread blocks and formed with elongated slots35,

receptive of straps or other like fastenings (notlshown) which may hepassed around the inner surface of the tire thus holding each bloeitfirmly in position.

ln addition to the reinforcing plate 28, use may also he made of asupplementary reinforcing plate 38, superposed thereon and formed withopenings 39, so that the tread block material may be vulcanized,portions passing through the openings 32 and 39, acting as dowels andholding the structure firmly togethern Formed upon opposite sides of theplates 38 are projections 40, having curved exterior edges and bent tobe seated closely on the plates 28 in an overlapping manner.

Also Vformed with the plates 30 are corner extensions containingperforations i3, receivable of links dei, by which the several treadblocks may be connected together, as can best be seen in Fig, lu

Alternative forms of outer plate construction are indicated in Figs. iland l2, in the former of which a plate 4:5 is provided with openings39', center projections 40', and

angular corner projections'el containingv perforations 4:3', the samebeing essentially like the plates 38, cut in half.

In Fig. 12 a simpler form of construction maybe observed in which a pairoff cross strips 46 are provided with a` central opening 39, theextending ends 42 of the strip having perforationsll,for the purpose ofconnecting the blocks together, and it will naeaeie be obvious that.other forms than those indicated may be used forthe same general purposewhile the central openings may be of .any desired shape or size.

lt is'to he understood that these tread blocks are intended to berigidly engaged with the outer surface of thetread of the wheel, byvulcanizing the material firmly,

thereto, while the outer and inner portions of the tread blocks aresimilarly secured together so as to firmly embed the plates beshown inFig. 9, other changes appearing in i the shape of the peripheralcontacting suriace of the element 20, in which the raised surfaces 2lare omitted and the sides 48 beveled, presenting a vfiat circumferentialface extending completely across the blocks, which are arranged closelyadjacent so as to present a substantially unbroken surface adapted toreceive a sectional metallic band 50, having a tread surface 5l, andformed v with angular flanges 52 adapted to make contact with the sides48 of the tread blocks. Rising from oneside of the tread face 51 is a'raised annular flange 54, adapted toiy make contact with the side of a.rail head upon .which the tread 5l engages, thereby providing a devicewhich may be used in traveling over the trackway of aI railroad.

These bands may be made in two or more sections so as to be engagedwith` the tire at any desired tiine,`and through the tread portionextend longitudinal openings recep.

tive of wires 55, which may be engaged at their abutting ends'by nuts orother suitable fastenings (not shown) entering the enlarged annularopenings 56, formed in the abutting ends 'of the elements 51, therebyproviding an eilicient means for maintaining a vehiclel upon the trackofa railroad.

.lhe devices presented obviously will overcome the danger of puncturefrom contact with articles upon a road Way, the reinforcing armor plates28 and 38 obviously preventing the passing of sharp articles through thetire, While the several raised surfac'zesd operate to overcome sliddingand assist 'mae terially in the traction effects attained by' thewheels.

From the foregoing it will be seen that a,

construction has been presented -vvell adapt-v ed to vattain all oi' theseveral objects pointed out in a simple and olicicnt manner, andl itwill be understood thaty the ,nstruction reinforced andvulcanized to thesurface of,

the said tire, and longitudinal recesses formed 1n sald blocks' onthesides engaged with said tire.

,the corners thereof.

3. A tire tread block, comprised of inner and outer layers of resilientmaterial, metallic plates inserted between said layers, said platesbeing curved substantially concentric with the tire and having openingsradial .with the center of the tire through 'which theresilient materialpasses when in a semi-plastic state, said` inner and outer layers beingintegrally connected together by vulcanization.

4. A tire tread block, comprising an inner layer of resilient materialshaped to conform to the tread of a tire, a metallic plate partiallyenveloping said inner element. said metallic plate having openingsformed therethrough, corrugated end elements formed with said-metallicplate, and an outer resilient layer integrally united with said. innerlayer completely enveloping said metallic plate.

A tire tread block comprising inner and outer resilient elements, anapertured 1netallic plate embedded therebetween, said inner and outerelements being integrally connected through the apertures and around themargins of said plate, and means formed with said plate extendingout-ward at the corners of said outer element whereby said blocks may beconnected together in a row around the surface of the tire.

6. In a tread block for pneumatic tires, the combination with inner andouter resilient elements, of a metallic reinforcing plate bent toconform substantially to the cross; section of said tread, asupplementary plate arranged adjacent to said reinforcing plate, meansformed in said supplementary plate whereby it may be firmly embedded inthe outer of said resilient elements, project-ions formed at the cornersof said supplementary plates, said projections extending through thesurface of said upper element, and links connecting said projections soas to form a row of blocks around the circumference of a tire.

7. In a, tire tread, the combination with the tread of a vehicle, of aplurality of tread elements arranged in a circumferential row andvulcanized to said tread, each of said tread elements comprising aninner and outer member and reinforcing guard plates embeddedtherebetween.

In testimony whereof we have signed our names to this specification.

ABRAHAM ROSENERG. AMBROSE I'I. ROSENTI-IAL.

